User: Please carefully read the following conversation and answer: Is the very last utterance from the speaker a positive or negative feedback? Often negative feedbacks include corrections and keywords like no, not, undo, don't, with generally negative sentiment, while positive feedbacks often include good, yes, correct, okay, or simply move on to the next stage. Lean towards negative if it sounds neutral.
(start of the conversation)
	Listener: select C 
	Speaker: good, the top is flat, the left side is flat, and the right side has spikes 
	Listener: select F 
	Speaker: undo, the flat part is on the right and it's running vertically 
(end of the conversation)
Answer a single word, Positive, or Negative. 
Assistant: Negative.